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NF400-SEP
Mitsubishi NF400-SEP User Manual
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MOULDED CASE CIRCUIT BREAKERS
HEAD OFFICE: MITSUBISHI DENKI BLDG., MARUNOUCHI, TOKYO 100-8310. TELEX: J24532 CABLE: MELCO TOKYO
Y-0525-C 0007 (ROD) Printed in Japan
Made from recycled paper
Revised publication, effective July. 2000
Specifications subject to change without notice.
Be sure to read the instruction manual fully before using this product.
Safety Tips
:
79
Table of Contents
Default Chapter
2
Table of Contents
2
1 Introduction
3
2 Features
4
Arc-Extinguishing Device - ISTAC
4
Digital ETR
5
3 Construction and Operation
7
4 Characteristics and Performance
12
Overcurrent-Trip Characteristics
12
Short-Circuit Trip Characteristics
12
Effects of Mounting Attitudes
13
DC Tripping Characteristics of AC-Rated Mccbs
13
Frequency Characteristics
13
Switching Characteristics
14
Dielectric Strength
14
5 Circuit Breakers Selection
15
Circuit Breakers Selection Table
15
6 Protective Co-Ordination
40
General
40
Interrupting Capacity Consideration
41
Selective-Interruption
42
Cascade Back-Up Protection
47
Limiting Characteristics
49
Protective Coordination with Wiring
50
Protective Coordination with Motor Starters
53
Coordination with Devices on the High-Voltage Circuit
55
7 Selection
58
For Motor Branch Circuits
58
For Lighting and Heating Branch Circuits
58
For Main Circuit
59
For Welding Circuits
59
For Transformer-Primary Use
61
For Capacitor Circuits
62
For Thyristor Circuits
63
Selection of Mccbs in Inverter Circuit
69
8 Environmental Characteristics
71
Atmospheric Environment
71
Vibration-Withstand Characteristics
72
Shock-Withstand Characteristics
73
9 Short-Circuit Current Calculations
74
Purpose
74
Definitions
74
Impedances and Equivalent Circuits of Circuit Components
74
Classification of Short-Circuit Current
77
Calculation Procedures
78
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Mitsubishi NF400-SEP Specifications
General
Brand
Mitsubishi
Model
NF400-SEP
Category
Circuit breakers
Language
English
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